IvySkin has released their new SmartCase featuring interchangeable battery pack and patented Touch-Thru glass screen. And IvySkin is running a holiday sale from today until Nov 30, you can save 20% on SmartCase products. Here is more info on the case and how you can save:

The all new SmartCase for iPhone 4 offers a sleek appearance, flowing curves and non-slip grips. The SmartCase 4 sends a signal to iPhone to drain the case's power first before using the iPhone's battery. This advanced power distribution system increases iPhone?s battery life by 200%.

The authentic Glass Touch-Thru screen protects, guards, and maintains the iPhone?s screen through two layers. The glass screen is embedded into the case so in case of a fall, the iPhone's fragile screen is fully protected.

UltraHybirdWe believe the only way to have a full hybrid battery case is by having the option to remove the battery pack when needed. With our Quattro 4 base-frame hard protection system, you now have the option to remove the battery pack and slide in the thin back piece for a super slim case. Unlike most of our competitors, we have devised a design in which you only install the battery pack when needed. When the battery pack is not in use/being charged, you'll be able to install the original slim back piece to fully protect your iPhone 4.

Status IndicatorThe integrated LED status indicator tells you exactly how much juice is left at the push of a button. It also indicates the charging status so you know before you go.

On/off switchThe integrated On/Off switch enables you to use the SmartCase?s power house only when is needed. Slide the switch to on position to have an instant access to a 1700mAh of power and turn it off to save its energy for much needed time.

Save up to 20% at IvySkin and avoid the long checkout lines. Now until Tuesday Nov 30, on SmartCase products only. Save 20%. Use Coupn code: RCC15